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Cat? W/5 behavior
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Cat AND charact*

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Disclosed is
a procedure that improves accuracy in an
online handwriting recognition system by using a majority decision of
nearest-neighbor matches for close decisions.

A common
approach for online recognition of handwritten
characters is to match an unknown character against prototype
characters (1-5). In order to reduce the
number of prototypes, and
therefore the computation time for matching, some systems use
prototypes that are averages over several characters. Using average
prototypes, however, can degrade recognition accuracy, particularly
when deciding between similar characters, like 2-Z and U-V.

In the new
procedure, a close decision is said to exist when a
second choice remains after matching against the average prototypes;
a second choice remains if it is close (within a threshold) to the
first. When this occurs, additional
matches are made between the
unknown and all the original characters that formed the two average
prototypes in question. The nearest N
original characters are
examined, where N is the smaller of 8 and twice the smaller number of
originals of the two classes. Of these N
characters, the procedure
chooses the majority if the ratio of the majority to the minority
exceeds three, e.g., 8-0 or 7-1.
Otherwise, it eliminates the
farthest of the N original characters and repeats the majority test,
e.g., 6-1. This step repeats until
either a decision is made
(majority/minority > 3, e.g., 5-1, 4-1) or N=4. When N=4, 3-1
decides in favor of the majority and 2...